EP1481900A2 - Umreifungsmaschine mit selbstreinigendem Schalter zur Zufuhrendschaltung - Google Patents

Umreifungsmaschine mit selbstreinigendem Schalter zur Zufuhrendschaltung Download PDF

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Publication number
EP1481900A2
EP1481900A2 EP04010146A EP04010146A EP1481900A2 EP 1481900 A2 EP1481900 A2 EP 1481900A2 EP 04010146 A EP04010146 A EP 04010146A EP 04010146 A EP04010146 A EP 04010146A EP 1481900 A2 EP1481900 A2 EP 1481900A2
Authority
EP
European Patent Office
Prior art keywords
strapping
internal
limit switch
strap
external
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04010146A
Other languages
English (en)
French (fr)
Other versions
EP1481900B1 (de
EP1481900A3 (de
Inventor
Timothy B. Pearson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Signode Industrial Group LLC
Original Assignee
Illinois Tool Works Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Publication of EP1481900A2 publication Critical patent/EP1481900A2/de
Publication of EP1481900A3 publication Critical patent/EP1481900A3/de
Application granted granted Critical
Publication of EP1481900B1 publication Critical patent/EP1481900B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00—Bundling articles
    • B65B13/02—Applying and securing binding material around articles or groups of articles, e.g. using strings, wires, strips, bands or tapes
    • B65B13/04—Applying and securing binding material around articles or groups of articles, e.g. using strings, wires, strips, bands or tapes with means for guiding the binding material around the articles prior to severing from supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/185—Details of tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00—Bundling articles
    • B65B13/02—Applying and securing binding material around articles or groups of articles, e.g. using strings, wires, strips, bands or tapes
    • B65B13/04—Applying and securing binding material around articles or groups of articles, e.g. using strings, wires, strips, bands or tapes with means for guiding the binding material around the articles prior to severing from supply
    • B65B13/06—Stationary ducts or channels

Definitions

  • the present invention is directed to an improved feed limit switch configuration for a strapping machine. More particularly, the present invention is directed to feed limit switch configurations for a strapping machine that, by action of the switches, eliminated dust and debris from the switches.
  • Strapping machines are used for securing straps around loads.
  • Known strappers include a strapping head and drive mechanism mounted within a frame. Strapping material is fed from a supply (e.g., a dispenser) into a chute that is mounted to the frame.
  • a typical drive mechanism includes feed wheels that "push" the material through the chute via the strapping head. The leading end of the strapping material traverses the chute and re-enters the strapping head at the end of the chute.
  • the strapping material that "reenters" the chute is gripped by a gripper when the strap reaches and contacts a limit switch. With the leading end gripped, the strap is rewound and tensioned around the load.
  • the strapping head also includes a cutter to cut the strap from the strap source or supply and a sealer to seal an overlying course of strapping material onto itself. This seal is commonly referred to as a weld and is effected by heating overlying courses of the strap by use of a vibrating element.
  • seals can be positioned about the juncture of the sliding portions of the switch and the housing in which it slides.
  • Lubricants and the like have also been used (in conjunction with seals) to prevent the introduction of contaminants. While these efforts have met with some success in limiting the ingress of contamination, they nevertheless require monitoring and maintenance to assure proper operation.
  • a limit switch assembly that limits the introduction of contaminants to the components of strapping machine limit switches.
  • such a limit switch assembly prevents the accumulation of dust and debris in the pockets formed by the sliding switch components.
  • a limit switch configuration is self cleaning in that it clears dust and debris during normal switch (sliding) operation.
  • a self-cleaning limit switch is configured for use in a strapping head of a strapping machine of the type that includes a feed assembly and a chute.
  • the strapping machine is configured to convey a strapping material into the strapping head, into and around the chute and to exit the chute and return to the strapping head.
  • the strapping head is configured to receive first and second courses of strapping material, position, tension and seal the strapping material around a load.
  • the strapping machine includes a limit switch assembly that limits the introduction of contaminants to the switch components.
  • the switch assembly prevents the accumulation of dust and debris in the pockets formed by the sliding switch components and is self cleaning in that it clears dust and debris during normal switch operation.
  • a strapping head that is configured to include the self cleaning switch includes internal and external limit switch channels formed therein.
  • the limit switch has a sliding element having internal and external sliding portions rigidly connected to one another. The internal sliding portion is positioned in the strapping head internal limit switch channel and the external portion is positioned in the strapping head external limit switch channel.
  • the internal and external sliding portions each include an inclined surface at a rearward end thereof and an upstanding wall surface at a forward end thereof.
  • the internal sliding portion has a lip for engaging the second course of strapping material for actuating or moving the limit switch.
  • the external sliding portion has a position indicating element thereon. Means for detecting the presence or absence of the position indicating element is mounted to the strapping head.
  • the sliding element is movable between a strap not present position when the second course of strapping material is not present at the limit switch, and a strap present position when the second course of strapping material is present at the limit switch.
  • Contact of the second course of strapping material with the internal portion lip urges the limit switch from the strap not present position to the strap present position.
  • Movement of the sliding element between the strap present and strap not present positions urges the sliding element inclined surfaces to dislodge debris that is present in the strapping head internal and external channels.
  • the internal and external sliding portions are preferably rigidly connected to one another, such as by a fastener.
  • the external sliding portion can include a projecting finger, the presence or absence of which is detected by a proximity sensor.
  • the sliding element is preferably biased to the strap not present position.
  • a strapping machine 10 having a strapping head 12 with a self cleaning feed limit switch 14.
  • the strapping machine 10 includes, generally, a frame 16, a strap chute 18, a feed assembly 20 and the strapping head 12.
  • a controller 22 provides automatic operation and control of the strapper 10.
  • the feed limit switch 14 is used to determine when the strap material that has traversed through the chute 18 and returned to the strapping head 12 (i.e., the second course of strapping material), and is properly seated within the strapping head 12 for subsequent operations, i.e., gripping and welding or sealing.
  • the limit switch 14 is a two position switch with one or more sensors for providing indication that the strap is properly seated.
  • the switch includes a sliding mechanical member 24 having internal and external portions 26, 28, respectively, and a proximity sensor 30 mounted adjacent the external portion 28.
  • the internal portion 26 of the sliding member 24 is positioned adjacent a vibrating weld member 32.
  • the internal and external sliding portions 26, 28 are mechanically connected (e.g., fastened) to one another by, for example, a threaded fastener 34 (shown in phantom in FIG. 5). In this configuration the internal and external portions 26, 28 slide as a single element 24.
  • Both the internal and external elements 26, 28 are positioned within internal and external open channels, 36, 38, respectively, formed in the strapping head 12.
  • the sliding portions 26, 28 traverse (slide) back and forth between end walls of their respective channels.
  • the ends of the sliding portions and the end walls of the channels are squared; that is, the ends of the walls are perpendicular to the direction of movement of the sliding portions. It has been found that dust and debris that collects in the channels can tend to pack into the corners of the channels and against the front and rear surfaces of the slide contacts. This can interfere with the sliding movement of the sliding components and cause improper operation of the sensor.
  • the present arrangements prevents the accumulation of dust and debris in the corners and at the front and rear surfaces of the sliding elements.
  • forward and rearward movement as well as forward and rearward (relative) parts and components, with forward movement referring to movement in the direction of travel of the strapping material (as indicated by the arrow at 40), and forward parts and components being those parts and components on the side in the downstream (i.e., leading side) direction of travel.
  • the present limit switch 14 arrangement is biased, with the slide 24 being biased in the rearward direction (opposite of 40). As will be described below, in this manner, the switch 14 is biased to indicate that the strap is not seated for sealing.
  • a present slide 24 includes an inclined rear surface 42 that tends to push dust and debris away and, in those instances where accumulation may have already occurred, the inclined surface 42 tends to scrape or dislodge accumulated matter from the base of the slide channel 38 when the slide 24moves in the rearward or biased direction.
  • the rear wall 44 of the channel 38 (that wall opposite of the slide rear surface) is squared or generally transverse to the direction of slide 24 movement.
  • the forward end 46 of the slide channel 38 is inclined, again, to urge or force debris out of the channel 38.
  • the forward end 48 of the slide 24 is squared (or transverse to the direction of travel), but cooperates with the inclined channel surface 46 to move debris out of the channel 38. As can be seen from FIG. 5, the debris is forced outward, away from the switch 14 components.
  • the slide 24 includes an inclined rear surface 50 that again tends to push dust and debris away and can scrape or dislodge accumulated matter from the base of the slide channel 36 when the slide 24 moves in the rearward or biased direction.
  • the rear wall 52 of the channel 36 (that wall opposite of the slide rear surface) is squared or generally transverse to the direction of slide movement.
  • the forward end 54 of the internal slide channel 36 is inclined, again, to urge or force debris out of the channel 36.
  • the forward end 56 of the slide 24 is squared (or transverse to the direction of travel), but cooperates with the inclined channel surface 54 to move debris out of the channel 36.
  • the internal portion 26 of the slide 24 includes a lip 66 that cooperates with the second course of strap as it moves into the strapping head 12.
  • the strap when properly seated, contacts the lip 66 and urges the slide 24 forward so that the sensor 30 changes state, indicating the presence of strap within the sealing head 12 (by movement of the slide 24 component).
  • This provides a signal to the strapper motor (typically through a programmable logic controller or other control means) to isolate the power feed to the motor to stop feeding strap into the machine 10.
  • the present self-cleaning limit switch assembly 14 reduces or eliminates the introduction of contaminants to the components around the limit switch 14, and prevents the accumulation of dust and debris in the pockets 58, 60, 62, 64 formed by the slide 24 components in their respective channels 36, 38 or tracks. This is due, in part, to the ability to move the proximity switch/sensor 30 away from the strap contacting components (e.g., the internal components 26), while at the same time, locating the switch/sensor 30 reasonably near the external switch components 28. To this end, a projecting finger 68 extends from the external sliding portion 28 for cooperating with the proximity sensor 30.
  • the present limit switch 14 configuration maintains the regions around the slide components 24 clean by virtue of strapper operation, e.g., during normal switch (sliding) operation, without complex compressed air systems or sealed and/or lubricated assemblies.
  • the switch 14 is biased to the strap not seated position.
  • a present switch 14 is biased by a spring 70 that is positioned in an opening 72 in the strapping head 12 (at the anvil 74) that is retained in the opening by, for example, threaded plug 76 or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
EP04010146.1A 2003-05-28 2004-04-29 Umreifungsmaschine mit selbstreinigendem Schalter zur Zufuhrendschaltung Expired - Lifetime EP1481900B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/446,591 US6871584B2 (en) 2003-05-28 2003-05-28 Strapping machine with self cleaning feed limit switch components
US446591 2003-05-28

Publications (3)

Publication Number Publication Date
EP1481900A2 true EP1481900A2 (de) 2004-12-01
EP1481900A3 EP1481900A3 (de) 2012-01-04
EP1481900B1 EP1481900B1 (de) 2014-04-16

Family

ID=33131567

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04010146.1A Expired - Lifetime EP1481900B1 (de) 2003-05-28 2004-04-29 Umreifungsmaschine mit selbstreinigendem Schalter zur Zufuhrendschaltung

Country Status (2)

Country Link
US (1) US6871584B2 (de)
EP (1) EP1481900B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105691692A (zh) * 2016-03-24 2016-06-22 浙江维融电子科技股份有限公司 一种点扎一体机的捆扎带自动剪烫机构

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2101964B1 (de) * 2006-10-31 2012-07-04 Force Dimension Technologies Sàrl Parallele kinematische struktur
US11999516B2 (en) 2008-04-23 2024-06-04 Signode Industrial Group Llc Strapping device
US10518914B2 (en) 2008-04-23 2019-12-31 Signode Industrial Group Llc Strapping device
DE102011075629B4 (de) 2011-05-11 2016-09-15 Smb Schwede Maschinenbau Gmbh Verfahren zur Ansteuerung der Bandantriebseinrichtung einer Umreifungsmaschine sowie entsprechende Umreifungsmaschine
US9272799B2 (en) 2011-10-04 2016-03-01 Signode Industrial Group Llc Sealing tool for strap
US10577137B2 (en) 2015-12-09 2020-03-03 Signode Industrial Group Llc Electrically powered combination hand-held notch-type strapping tool
EP4247713A2 (de) 2020-11-17 2023-09-27 Signode Industrial Group LLC Bandzuführungsanordnung mit bandgrössenanpassungsfunktionen
CA3205609A1 (en) 2020-12-23 2022-06-30 Signode Industrial Group Llc Strap-tensioning assembly with self-energizing tensioning wheel and strap-size-adjustment features

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154158A (en) 1977-09-22 1979-05-15 Signode Corporation Method and apparatus for binding an article with a loop of tensioned strap

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3613556A (en) * 1970-04-22 1971-10-19 American Hoist & Derrick Co Apparatus for horizontal baling
JPH0747284Y2 (ja) * 1991-10-01 1995-11-01 昌弘機工株式会社 自動梱包機
JPH0740921A (ja) * 1993-07-20 1995-02-10 Kioritz Corp 梱包機
US6637324B2 (en) * 2001-07-31 2003-10-28 L & P Property Management Company Wide aperture wire tracking for baling machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154158A (en) 1977-09-22 1979-05-15 Signode Corporation Method and apparatus for binding an article with a loop of tensioned strap

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105691692A (zh) * 2016-03-24 2016-06-22 浙江维融电子科技股份有限公司 一种点扎一体机的捆扎带自动剪烫机构
CN105691692B (zh) * 2016-03-24 2018-01-05 浙江维融电子科技股份有限公司 一种点扎一体机的捆扎带自动剪烫机构

Also Published As

Publication number Publication date
US6871584B2 (en) 2005-03-29
US20040237807A1 (en) 2004-12-02
EP1481900B1 (de) 2014-04-16
EP1481900A3 (de) 2012-01-04

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